Model Details
Context Length
400K
Max Output
NA
Released
Nov 2025
Status
Active
Provider
OpenAI
Where is gpt-5.1-codex a perfect fit?
Where is GPT-5.1 Codex a perfect fit? - Long-running, autonomous coding agents and workflows - Continuous code review and refactoring in large repositories - Automated test generation, CI/CD integration, and pull-request suggestions - Interactive development in terminal or IDE via Codex CLI or extension - Coding tasks where the model needs to think deeply, plan, and iterate over hours
Quick Model Estimate
Your GPT-5 Cost Estimate
💰 Total Cost
USD 3.00
for 1000 input + 1000 output tokens
📥 Input (1000 × $1.250000)
USD 1.5000
📤 Output (1000 × $10.000000)
USD 1.5000
Cost Breakdown
📥 Input 50%
📤 Output 50%
Prices updated daily from official provider data.
Pricing
|
Provider
↕
|
Input Price
(per 1M tokens) ↕ |
Output Price
(per 1M tokens) ↕ |
Context Window
↕
|
Last Updated
↕
|
|---|---|---|---|---|
 OpenAI |
$1.2500 | $10.0000 | 400,000 tokens | 2025-11-18 |